123131112103 has 4 divisors (see below), whose sum is σ = 123714672088. Its totient is φ = 122547552120.

The previous prime is 123131112101. The next prime is 123131112107. The reversal of 123131112103 is 301211131321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123131112103 - 2¹ = 123131112101 is a prime.

It is a super-2 number, since 2×123131112103² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123131112101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 291779676 + ... + 291780097.

It is an arithmetic number, because the mean of its divisors is an integer number (30928668022).

Almost surely, 2^123131112103 is an apocalyptic number.

123131112103 is a deficient number, since it is larger than the sum of its proper divisors (583559985).

123131112103 is an equidigital number, since it uses as much as digits as its factorization.

123131112103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583559984.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 123131112103 its reverse (301211131321), we get a palindrome (424342243424).

The spelling of 123131112103 in words is "one hundred twenty-three billion, one hundred thirty-one million, one hundred twelve thousand, one hundred three".